If anyone is interested in moving boxes you might also check Costco.com.
We're moving soon and my son recently mentioned that he had noticed they had great prices on boxes too. I just quickly compared prices on a couple of the kits, and some of them seem to be even a little cheaper than this used box place. Costco's are new, and it looked like they also ship them for free, but I didn't notice if they come with tape and stuff though. But this site looks great too, Charlie, and I'll definitely check it out when we're ready to buy. Thanks!